At Vauxhall station, one the capital's fare-dodging ultra-hot spots, six revenue protection officers from South Western Railway set a trap to block rush-hour fare dodgers, with their first catch being an unrepentant man who has pushed through the barrier determined not to pay. Sam and Harry go undercover on a major sting operation at Byfleet and Haw, one of the busiest fare dodging stations outside London, while Lauren and Dan face threats of violence from an angry and potentially dangerous passenger who refuses to pay for his travel